18 months and up. Enable children to establish deeper connections with the world around them with the nature-inspired Plush Mushrooms set. This set combines high-contrast colors and various auditory elements such as beeps, crinkles, and rattles to create stimulating sensory experiences for young children. The set's design also includes space for the mushrooms to nest inside one another and Velcro® to attach the mushrooms to one another. Large mushroom measures 12" x 12" x 2", medium mushroom measures 6" x 6" x 1.5", small mushroom measures 3" x 3" x .5".